• Reds call up Y. Rodriguez, option J. Smith
It hasn't been a robust 2015 season for Holmberg, who is ranked by MLB.com as the Reds' No. 20 prospect. In 16 games, including 15 starts, this season for Louisville, he is 4-6 with a 4.78 ERA. Over 92 1/3 innings, Holmberg allowed 114 hits, 12 home runs and 36 walks with 51 strikeouts.
In seven games -- including five starts -- for the Reds in 2014, Holmberg was 2-2 with a 4.80 ERA.
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, follow him on Twitter @m_sheldon and Facebook and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.